ConfirmDialog: Fix affirmative action being triggered an extra time when selecting a button via keyboard#51730

ciampo merged 7 commits intotrunkWordPress/gutenberg:trunkfrom

fix/confirm-dialog-triggers-affirmative-action-when-selecting-cancelWordPress/gutenberg:fix/confirm-dialog-triggers-affirmative-action-when-selecting-cancelCopy head branch name to clipboard